Bug: https://bugs.gentoo.org/895896
--- a/liblcdf/permstr.cc
+++ b/liblcdf/permstr.cc
@@ -111,8 +111,8 @@ static int scatter[] = {        /* map characters to random values */
 void
 PermString::initialize(const char* s, int length)
 {
-    register unsigned char* m = (unsigned char*) s;
-    register unsigned char* mm;
+    unsigned char* m = (unsigned char*) s;
+    unsigned char* mm;
 
     if (length < 0)
 	length = (s ? strlen(s) : 0);